Screening apparatus



' May 14, 1935.A L. E. soLDAN v 2,000,998I

ECREENING APPARATUS Filed Feb. 11 1951 2 Sheets-Sheel 1 5 27 21 Z5 22 27 Z5' fnl/@275% @m5 550mm May 14, 1935.l

l.. E. SOLDAN 2,900,998

SCREENING APPARATUS Filed Feb. 11, 1931 2 sheets-sheet 2 Patented Mey 14, 1935 UNITED STATES PATENT oFFicE SCREENING APPARATUS Lewis E. solden, Gluem, nl., assignmto Preductive Equipment Corporation, Chicago, Ill., a

corporation of Illinois Applieatieh February 11, 1931, serial No. 515,029

3 Claims.

`diiiiculty by placingw mats of rubber and other yieldable materials beneath theglegs of the devices, but such mats have failed to give the results desired.

The principal object of the present inventionv is to provide, in a screening` device or other vibrating device, novel shoes on the legs of the device for absorbing the vibrations set up by the latter, which shoes will eiilciently absorb practicaily all of the vibrations and are simple, in-

expensive, durable and easy to apply.

`Other objects and advantages of the invention will be apparent to those skilled in the art upon a full understanding of the construction, arrangement and action of the novel vibration-absorbing means.

'I'hree different structural embodiments of the invention are presented herein by way of exemplication, but it'will of course be understood that the invention is capable of being incorporated in other structural forms coming equally within the scope oi the appended claims.

In the accompanying drawings:

Fig. l is a side view of a screening apparatus equipped with the shoes oi' the invention;

-Fig. 2 is a fragmentary side view of the apparatus illustrated vin Fig. 1, showing one of the legs of the apparatus and'one of the shoes attached to the leg;

Fig. 3 is a vertical section through the shoe, taken on the line 3 3 of Fig. 2;

Fig. 4 is a horizontal section through the shoe, taken on the line 4 4 of Fig. 2;

Fig. 5 is a vertical section through a modied form of the shoe, taken adjacent one side of the shoe on a plane parallel to the side of the apparatus;

Fig. 6 is a diiierent vertical section through the shoe shown in Fig. 5, taken on the line 6 6 of Fig. 5;

F18. 7 is a side view of another modified form of the shoe;

7 Flg is anend view of the shoe shown in Fig.

i Bn

Fig. 9 is a horizontal section through the same shoe, taken on the line 9 9 of Fig. 7.

The form of the invention shown in Figs. 1 to 4 inclusive will rst be described. In that formas in the other subsequently described forms- 5 the shoes III which constitute the vibration-absorbing means are attached to the legs II of the screening apparatus I2. While only two of the shoes are visible in Fig. l, four are actually used,

one at each of the four corners of the frame I3 10 of the apparatus. The particular screening apparatus I2 is the same as that which constitutes the subject matter of Soidan application Serial No. 325,692, filed December 13, 1928, and there- `fore need not be described in detail. Briefly, the 15 frame I3 supports an eccentric shaft Il on which a screen I5 is mounted. When the shaft I4 is rotated, a circle-throw movement is imparted to the screen. Since the shoes on' all tour legs oi' the screening apparatus are of similar con- 20v struction, only one need be described.

Each of the legs II of the screening apparatus is provided with two horizontally elongated connecting plates I 8 which are. secured in vertical planes against opposite sides of the end of the leg 25 by bolts Il and project horizontally beyond the end in spaced parallel relation to each other. The plates I6, which form in eiect a horizontal extension of the ieg II, project .into a box-like housing I8 which is fastened to the floor by bolts 30 I9 and is provided with a slot 2D in its inner end lto receive the plates with some marginal clearance. Y

The housing I8 contains two spaced parallel slabs 2| of tough resilient rubber which are posi- 35 ticned in vertical planes against the sides 22 o! the housing between such sides and the opposing sides of the plates I8. The slabs 2I are faced with metal sheets 23 and 24 which are vulcanized in position. 'Ihe sheets 23, which are disposed 40 against the sides 22 of the housing, are apertured to interlock with heads of screw studs 25 embedded in the slabs, while the sheets 24 are similarly -apertured to interlock with the heads oi' screw studs 2l embedded in the slabs. The 45 studs 25 pass vthrough apertures in the sides 22 of the housing and are drawn up tight by nuts 21, while the studs 26 pass through apertures in the plates I 8 and are drawn up tight by nuts 28.

The lower edges of the plates I8 are supported 50 clear of the iloor and are also Supported clear of the sides, top and ends of the housing I8, whereby to prevent metal-to-metal contact upon vibration of the leg I I with respect to the shoe I0. The vibration which is set up in the screening 55 apparatus is transmitted to the slabs 2| in the plane of the latter, and the clearances above referred to permit of slight up-and-down and endwise movements of the plates within the housing I8.

From the foregoing description it will be understood that the outer faces of the slabs 2l are rigidly securedto the sides of thel'iousing I8, that the inner faces of such slabs are rigidly'secured to the leg-extension plates I6, and that the entire weight of the screening apparatus is carried by the rubber of the slabs with the latter in a non-compressed condition.

In the modiiied form of the invention shown in Figs. 5 and 6, the leg 29 of the vibrating device is provided at its lower end with a horizontally extending portion 3l. The leg portion 30 projects into a housing 3| through an opening 32 in the inner end of the latter and is provided with a laterally extended top flange 33 which is secured by bolts 34 to the bottom face of the single horizontally disposed rubber slab 35'. The top face of the slab 35 is similarly secured by bolts 36 against the top 31 of the housing. In this form of the invention, the leg 29 is suspended from the top 31 of the housing by the slab 35, which slab is similar in, construction to the previously described slabs 2|. The leg portion 38 is also advantageously provided with a lower iiange 38 which is positioned just above a rubber cushioning block 39 in slightly spaced relation to the latter. The block 39, which is seated in a recess in a cross web 40 at the bottom ot the housing 3|, serves as a limiting abutment to stop abnormal vertical movement of the leg 23. A similarly functioning block may also be incorporated advantageously in the other forms of the invention.

In the modification shown in Figs. 7, 8 and 9,

the leg 4| is provided with a at outspread vertically extending foot 42, which foot extends into an open-ended housingf43 and is connected to the vertical back wall 44 of the housing by an interposed rubber slab 45,' one face of the slab being clamped to the leg 4| by bolts 46, and the other face being clamped to the housing by bolts 41.

I claim:

1. In screening apparatus, in combination, a frame having supporting legs, a screen carried by the frame, mechanical means for causing a positive vibration of the screen relative to the frame and supporting legs, shoes on the legs of the frame for rigid attachment to the iloor on which the apparatus rests, and rubber members carried by the shoes and connected with the legs for supporting the weight of the apparatus with the rubber members in uncompressed condition.

2. In screening apparatus, in combination, a frame, a screen carried by the frame, mechanical means for causing a positire vibration of the screen relative to the frame and supporting legs, and a support for the frame consisting of a bracket for rigid attachment to the floor on which the apparatus rests, and a rubber slab associated with the bracket, one face of said slab being rigidly attached to the bracket, and the other face of the slab being rigidly attached to the frame.

3. A vibration-absorbing shoe for application to the leg of a. rapidly rotating device, consisting of a generally rectangular housing which is open at one end to receive and enclose the end of the leg, and a iiat rubber block positioned under tension in the housing, one face of said block being rigidly attached to the housing, and the opposite face of the block being provided with means for rigid attachment to the leg.

LEWIS E. SOLDAN. 

